Brake-block



(No Model.)

- H. BUTTS & J. J. EDMONDS.

BRAKE BLOCK.

No. 425,206. Patented Apr. 8, 1890.

mm. fizz 7% A fie/i- 41 4 5 m: was PEYERS co iHOTmLlTHu WASNINGTGN, n. c.

UNITED STATES PATENT OFFICE.

HIRAM BUTTS AND JOHN JAY EDMONDS, OF SAN DIEGO, CALIFORNIA.

BRAKE-BLOCK.

SPECIFICATION forming part Of Letters Patent NO. 425,206, dated April 8, 1890.

Application filed December 6, 1889. Serial No. 382,833. (No model.)

To all whom it may concern.-

Be it known that we, HIRAM BUTTS and JOHN JAY EDMONDS, citizens of the United States, residing at San Diego, in the county of San Diego and State of California, have invented certain new and useful Improvements in Brake-Blocks; and we do hereby declare the following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to improvements in brake-shoes; and it consists in certain novel features hereinafter described and claimed.

In the accompanying drawings, which fully illustrate our invention, Figure 1 is a perspective View of our improved brake-shoe. Fig. 2 is a sectional view on the line 00 no of Fig. 1, and Fig. 3 is a front edge view.

Referring to the drawings by letter, A des ignates the body of ourimproved brake-shoe, which is constructed of metal, as will be readily understood, and is provided with the dovetailed groove B in its upper edge, in which a stop-block O is mounted and adapted to slide. This stop-block C is provided with inclined or dovetailed side edges, as clearly shown, so that it will .fit snugly in the said groove and be prevented from lateral movement thereby, while at the same time it can be easily adj usted to project over the front edge of the body a proper distance, as will be presently referred to. The stop-block is secured at any point to which it may be adjusted by a setscrew D, which passes through a slot E in the stop-block and engages an opening F in the upper end of the body A. The body A is provided on its front side with downwardlyconverging dovetailed grooves G, and the brake-block H is mounted in these grooves, as shown. The brake-block is made wedge shape, so that as it is driven into these grooves it will be made to fit tightly therein, and so be secured. The brake-shoe is secured to the brake-rod by passing the end of the brakerod I through a central transverse opening J in the body of the shoe and then securing said rod-by a nut or other suitable securing device.

The construction and arrangement of the several parts of our device being thus made known, the operation and advantages of the same will, it is thought, be readily understood.

The brake is applied to the wheel in the usual manner, and the brake-block will bind thereon so as to prevent rotation thereof. When the wheel is caused to rotate in a forward direction, the force thereby applied to the brake-block causes it to move downward in the grooves G, so that it will be secured more firmly in the same, and when the wheel is given a backward movement the brakeblock will be forced against the stop-block, and thus prevented from being released from the body. When the brake-block is worn out or broken, it can be readily removed and a new one substituted. In order to effect this the set-screw D is removed and the stop-block then withdrawn from the grooves B, after which the brake-block is drawn toward the upper diverging ends-0f the grooves Gr, and thus removed from the body. A new brakeblock is then fitted in place and the several parts replaced in their normal positions.

It will be observed that our improved brakeshoe is very simple in its construction, and can consequently be manufactured at a slight cost. The several parts can be easily removed, so that the device can be easily and thoroughly cleaned when so desired, and so that any one part can be repaired or replenished without affecting the other parts.

Our improved brake cannot be thrown from its fasteningsby a backward movement of the wheel, as such movement will force the brake-block against the stop-block, which will prevent the removal of the said brake-block. It will be seen at once that the setscrew secures the stop-block in place, so that it will be projected over the end of the brake-block sufliciently to prevent upward movement of the brakeblock.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is

1. A brake-shoe consisting of a body having dovetailed grooves in its top and front edges, a brake-block fitted in the groove in the front edge of the body longitudinally adjustable, a stop-block fitted in the groove in the top edge of the body, and a set-screw inserted through the stop block and into the end of the body, as set forth.

2. The improved brake-shoe herein de- In witness whereof We have hereunto set IO scribed and shown, consisting of the body our hands and seals. having thetmnsverse openinsrJ and provided r v in itsfront edge with the downward] y-converg"- OYDS Q .L r. Jrl i7. 4..

5 ing grooves G and in its top edge with the grooves 13, a brake-block fitted in the grooves Witnesses:

G, a stop-block fitted in the grooves B, and a A. B. SMITH, set-screw inserted through the stop-block and 'lI-IOS. II'. MORTON, into the body, as set forth. 0. A. TAYLOR. 

